Resilient tire



D. J. DEMAS..

RESILIENT TIRE.

TION FILED Patented Apr. 20, 1920.

DEMETBEOS J. DEMAS, 0F PITTSBURGH, PENNSYLVANIA.

RESILIENT TIRE.

Specification of Letters Patent.

Patented Apr. 20, 1920.

Application filed February 21, 1919. Serial No. 278,392.

To all whom it may concern:

Be it known that I, DEMETREOS J. DEMAS, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inResilient Tires, of which the following is a specification.

My invention relates to resilient tires adapted for use uponself-propelled vehicles, while not necessarily restricted to such use.

An important object of the invention is to provide a resilient tire ofthe above mentioned character, which is equipped with anti-skiddingmeans, such means being so arranged upon and secured to the tire thatthe tire is not injured by the same, as where the anti-skidding meansare applied to a tire of ordinary construction.

A further object of the invention is to provide a tire of the abovementioned character, having flexible anti-skiddin means,

of the chain type, which are free from undue noise or rattling, inoperation.

A further object of the invention is to provide means for securelyholding the antiskid means upon the tire.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the acompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Figure 1 is a side elevation of apparatus embodying my invention.

Fig. 2 is a transverse sectional view taken on line 2-2 of Fig. 1.

Fig. 2 is a cross-sectional view through a solid tire embodying theinvention.

In the drawings wherein, for the purpose of illustration, is shown apreferred embodiment of my invention, the numeral 10 designates a wheelof an automobile or the like, having a felly 11; This felly is equippedwith a metallic rim 12, rigidly secured thereto by any suitable means.This metallic rim 12 is provided at one edge with a flange 13, while itsouter edge is straight, as shown. The rim 12 receives the demountablerim 14, having flanges 15. The rim 1.4 receives and holds the pneumatictire 16. The rim 14 is held upon or within the rim spaced Wedges ortapered blocks 17, red to the felly 1.1. by bolts 18 or the like, asshown. This is the usual type of demountable rim for securing thepneumatic tire to the felly, and is shown simply for the purpose ofillustrating the present invention, it being understood that suchinvention may be used in connection with any other form of rim.

In constructing my tire 16, I prefer to embed in the tread portionthereof, a plurality of flexible reinforcing elements 18, which may bein the form of cords, ropes or wires. These cords 18 form an internalarmor, and prevent the chains, to be described, from injuring the tire.This armor also reinforces the tire, and prevents the same from beingpunctured. The tread portion of the tire is provided at spaced intervalswith recesses 19, formed through the rubber portion thereof. Theserecesses extend transversely of the tire and radially of the same. Theside walls 20 of these recesses'are inclined, as clearl illustrated inFig. 1. As clearly shown in igs. 2 and 2 the bottom wall of the recessterminates near or adjacent the reinforcing elements 1.8,therepreferably being a thin coating of rubber upon the cords 18 at thispoint.

I provide anti-skidding means which are arranged within these recesses19, such means preferabl consisting of flexible chain or chains 21. hesechains extend longitudinally of the recess 19 and contact with the loweror bottom wall thereof, While their upper surfaces are substantiallyflush with the tread surface of the tire. Particular attention is calledto the fact that these chains 21 contact with the bottom wall of therecess 19 and are virtually in contact with the reinforcing elements orcords 18, which serve to materially prevent the chains from wearing thetire, at the points of the recesses. Further, by having the outerportions of the chains substantially flush with the outer surfaces ofthe tread portion of the tire, excessive pressure is relieved from thechains, whereby the tendency of-the chains to injure the tire isreduced, but the chains are still free to function in preventingslipping or skidding of the wheel.

In the drawings I have shown attaching means for holding the treadchains 21 in place, such attaching means being connected with the follyof the wheel. This attaching means includes a pair of elements 22,provided at their outer ends with hooks or eyes 25, engaging withU-shaped elements 26, engaging the ends of the chains 21, as shown. Theelements 22 have their inner ends provided with eyes 27, to receivebolts 28, passing through transverse openings 29, formed in the felly.These bolts receive thereon covering plates or elements 30, apertured at31 The plates 30 are provided with longitudinal grooves 32,interiorlythereof, receiving the elements 22, the plates conforminggenerally to the curvature of the rims 12 and 14, as shown.

From the foregoing description, it will be seen that in the use of thevarious atranged Within these recesses and held there in by any of theattaching means shown and described in connection with the pneumatictire.

It is thus seen that the invention maybe applied to or embodied in apneumatic or solid rubber tire, or employed in connection with any formof resilient tire.

It is to be understood that the forms of my invention herewith shown anddescribed are to be taken as preferred examples of the same and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of my invention or thescope of the subjoined claims.

Having thus described myinvention, I claim: v

1. The combination with a tire provided with an internal armor andhaving a plurality of spaced transverse recesses formed in its treadportion, said recesses having their bottoms disposed adjacent theinternal armor, transverse anti-skidding chains arranged within therecesses and engaging said armor, and means for retaining the chainswithin the recesses.

2. A pneumatic tire provided in its tread portion with an internal armorand having a transverse recess formed in the tread portion exteriorly ofthe armor, the armor being exposed at said transverse recess and aflexible antiskidding element held within said recess. 7

In testimony whereof I aflix my signature.

DEMETREOS J. DEMAS.

